394 THE TEEEESTRIAL MOLLUSCA INHABITING 



study of Gould's juncea and the nearest allied species, the result of which, as will 

 be observed, materially modifies the synonymy as given in that article. 



As regai'ds Stenogyra Tuckeri, I think there is not the least doubt of its being 

 identical with Gould's juncea, which was published shortly after Pfeiffer's species. 



PfeifFer's description is as follows: — 



" T. perforata, cylindraceo-subulata, tenuis, longitudinaliter distincte striata, 

 nitidula, cerea; spira elongata, apice acutiuscula; aufr. 9 convexiusculi, ultimus 

 ^ longitudinis vix aequans; columella oblique recedens; apertura ovali-oblonga; 

 perist. simplex, acutum, margine columellari superne dilatato, patente. Long. 9, 

 diam. 2f mill, Ap. 2 mill, longa, 1^ lata." (Pfeiffer.) 



Biirlimtis junceus is thus described hj Gould: — 



" T. parva, elongato-conica, tenuis, translucida, dilute virens, concinne striata, 

 vix perforata ; spira ad apicem obtusa ; anfr. 7 convexiusculi ; superne contabulata ; 

 apertura elongato-ovata ; labrum simplex, ad columillam vix reflexum. Long. y%, 

 lat. Jo Pol-" (Gould.) 



Dr. Gould's expression ^^ superne contabulata" seems to have misled Prof. Mous- 

 son, who interpreted it to mean " angulate" or " carinate" instead of tumid, which 

 induced him to redescribe it under the name of S. upolensis, as follows : — 



" T. perforata, subulata, tenuis, subpellucida, striatula, cereo-cornea; spira 

 conico-subulata, regularise summo non minuto, obtusiusculo ; sutura profunda. 

 Anfr. 8, primi rotundati, sequentes satis in medio minus convexiusculi; ultimus 

 ^ longitudinis sequans, non descendens. Apertura subverticalis, oblongo-ovata. 

 Perist. rectum, acutum ; marginibus parallelis, recto de insertione antice arcuato, 

 columellari reflexo. Columella recta, subpliciformis, linea fuscula colorata. Diam. 

 2|, min. 2, altit. 10 mill. Rat. anfr. 4:1. Rat. apert. 5:3." 



" Var. minor. Alt. 8 mill., fragilior, pallidior, laevior, columella concolore." 

 (Mousson.) 



With respect to the geographical range of Tuckeri it is recorded from Manga- 

 reva (= Gambler Islands), Tahiti, Guam, and Dr. Cox says it is generally diffused 

 throughout Northeast Australia and the adjacent islands, as well as in the various 

 islands in Southwest Polynesia. Mr. Brazier collected it on several islands in 

 Torres' Straits, which gives it a range from east to west of over six thousand miles, 

 or one-fourth the circumference of the globe. The former writer says it was intro- 

 duced " to Sydney with plants from Aneiteum," one of the New Hebrides. 



I have not the slightest doubt of its general diffusion throughout the East 

 Indies, and it has been described from that region under other names. I will also 

 add that it may extend its range to the islands off the east coast of Africa, or half 

 the circumference of the globe. 



